Instructions for Part 1: Retrieval Grid

Complete the retrieval grids on page 1 for advantages and page 2 for limitations of the cricket tracheal system. The columns provide a starting point in identifying a key feature that either make the tracheal system more efficient for gas exchange (advantage) or less efficient (limitation). The rows are prompts to help you think more deeply about each advantage or limitation. 

Bullet points and short phrases are fine!